Mugged Opposite Shell Garage on Twist Street

I was mugged by a man opposite the shell garage in December on my way to work. This guy appears to act crazy, but that's only a ploy to let your guard down. He has a knife and will threaten to stab you if you don't give him money. He's a short and skinny, dark in complexion with a short but pointed bearded and small but slightly wide eyes. He almost always wears a black jacket with red stripes or just a black jacket. He's always on Twist between the early hours of the morning and typically leaves around 10am-12pm disappears to another street and always to returns around 3pm. He also likes to operate either on Twist Street or Klein Street. I've seen this man almost every week and just wish the police could do something about it!